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import (
"errors"
"strings"
"github.com/openmeterio/openmeter/pkg/sortx"
)
type SortOrder string
const (
SortOrderAsc SortOrder = "asc"
SortOrderDesc SortOrder = "desc"
)
var (
ErrSortByInvalid = errors.New("invalid sort by")
ErrSortFieldRequired = errors.New("sort field is required")
ErrSortOrderInvalid = errors.New("sort order must be either asc or desc")
defaultOrder = SortOrderAsc
)
func (s SortOrder) Validate() error {
if s != SortOrderAsc && s != SortOrderDesc {
return ErrSortOrderInvalid
}
return nil
}
type SortBy struct {
Field string
Order SortOrder
}
func ParseSortBy(sort string) (*SortBy, error) {
var s SortBy
err := s.UnmarshalText([]byte(sort))
if err != nil {
return nil, err
}
return &s, nil
}
func (s SortBy) Validate() error {
if s.Field == "" {
return ErrSortFieldRequired
}
if err := s.Order.Validate(); err != nil {
return err
}
return nil
}
func (s *SortBy) UnmarshalText(text []byte) error {
parts := strings.Fields(string(text))
if len(parts) == 0 {
return ErrSortByInvalid
}
if len(parts) > 2 {
return ErrSortByInvalid
}
s.Field = parts[0]
if len(parts) == 2 {
s.Order = SortOrder(parts[1])
} else {
s.Order = defaultOrder
}
return s.Validate()
}
func (s SortOrder) ToSortxOrder() sortx.Order {
if s == SortOrderAsc {
return sortx.OrderAsc
}
return sortx.OrderDesc
}
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